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J. L. HINDS. LAMP SOCKET.

No. 466,289. Patented Dec. 29, 1891.

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. UNITED STATES PATENT OFFICE.

JESSE L. I-IINDS, OF SYRACUSE, NEW YORK, ASSIGN OR TO THE ELECTRIC ENGINEERING AND SUPPLY COMPANY, OF SAME PLACE.

LAM P-SOCKET.

SPECIFICATION forming part of Letters Patent No. 466,289, dated December 29, 1891.

Application filed July 23, 1891- Serial No. 400,499.? (NomodeL) T0 all whom, it may concern.-

. class as shown in my pending applications, Se-

rial Nos. 400,498 and 400,500, filed conjointly herewith, and has for its object the production of a simple and effective device which is durable, practical, and economical in manufacture.

To this end it consists, essentially, in an outer shell, an insulator base-plate supported at the upper extremity of the-shell, a depending bracket secured to the bottom face of the insulator base-plate, a second insulator-plate secured to the bracket for supporting a socket having spring-arms adapted to engage and support the lamp and make contact with one of its collars connected to one of the lampterminals, a spring having one extremity connected to the insulator-base and formed with a depending and substantially vertical arm, a lateral yielding arm, a depending lug at the free extremity of the lateral arm, an inwardlyturned engaging end on said lug, a second socket-terminal supported on the second insulator-plate and adapted to make contact with the corresponding lamp-terminal, a cam for forcing the engaging end of the spring-arm into contact with the terminal, and a spindle connected to said cam with a lost motion betweenthe two. I

The invention furthermore consists in the means for securing the hand-piece to the spindle and in the detail construction and arrange'ment of the parts, all as hereinafter more particularly described, and pointed out in the claims.

In describing my invention reference is had to the accompanying drawings, forming a part of this specification, in which like letters indicate corresponding parts in all the views.

Figure 1 is alongitudinal vertical sectional view. Fig. 2 is a similar sectional view taken on line 2 2, Fig. 1, the upperv extremity of the lamp being shown as operatively engaged by the socket. Figs. 3 and 4 are respectively horizontal sectional views taken on lines 3 3 and 4 4:, Fig. 1. Fig. 5'is an inverted planof the detached top wall of the socket. Fig. 6 is a longitudinal vertical sectional view of thebracket between the insulator base-plate and the second insulator-plate. Figs. 7 and 8 are respectively isometric perspectives of the U-shaped bracketsecured to the baseplate for supporting the cam and the spring secured to said bracket for opening the circuit. Fig. 9 is an isometric perspective of the lamp-terminal adapted. to be engaged by the free end of the spring shown at Fig. 8. Figs, 10 and llare respectively topplan views of the insulator base-plate and the second insulatorplate, and Figs. 12 and 13 are respectively transverse vertical sectional views taken on lines 12 12, Fig. 10, and 13 13, Fig. 11; and Fig. 14 is a transverse sectional view taken on line 14 14, Fig. 3.

The outer shell A consists of the sheetmetal peripheral or sidewall a, the sheetmetal top wall at, having a depending flange a and the bottom ring a supported in an annular groove a of the side wall a and formed of suitable insulating material, as vulcanized fiber.

a represents a sleeve or nipple secured to the top wall a with its opposite extremities projecting on opposite sides thereof and formed with an annular horizontal shoulder a, adapted to rest on the top face of said wall a. The inner wall of the nippleis screwthreaded for receiving a suitable support, not necessary to herein illustrate or describe, and surrounding its inner end, which is swaged thereupon, is the huh I) of a brace B, having oppositely-arranged arms b, formed with depending extremities, disposed, as seen in Fig.

2, on the interior of the upper extremity of the side wall aand held in position by means of clamp-screws b, which are passed through openings in the depending flange of the top wall, the upper extremity of the side wall, and the projecting ends of the arms I). V

0 represents the insulator-base formed in its peripheral wall, as shown in Fig. 2, with recesses 0 adapted to receive the inner ends of the clamp-screws 1/ for retaining said base plate in position.

D, as best seen at Figs. 1, 2, 3, i, and (3,"is a depending bracket having a central huh (I and oppositely-arranged arms (1' d provided with inwardly-turned feet (1 adapted to be secured to the under side of the base-plate by clamps (i having one end engaged with said feet and their heads with the depressed shoulder d of sockets d in the top face of said base-plate. Formed upon one of the arms at is the lug d which supports one end of a wire E, adapted to be passed through a peripheral groove 6 in the base-plate G, a groove e in its top face, and the central opening of the sleeve a F represents the second insulator plat e, formed with an upwardly'projecting hub F, adapted to be passed through the ring at and be secured in position by oppositely arranged clamps f.

G represents a socket having an inwardlyturned flange or shoulder g,which rests against the under face of the insulator-plate F, and is secured thereto by the clamps f, which secure the insulator-plate to the bracket D. Depending from the lower extremity of the socket G are the yielding arms G, adapted to engage a shoulder h on the lamp II, as shown at Fi '2, and to also make contact with the outer ring h of said lamp, connected at 7L2- to one of the lamp-terminals. The inner socketterminal 1, Figs. 1, 2, 3, and 9, consists, preferably, of a metallic plate having depending engaging arms 2', and lateral lugs z" t", which are imposed upon the top face of the second insulator-plate F, and are secured thereto by clamps '6 The depending armsi are passed through an opening F in the insulator-plate, and, with the exception of theirextrerne ends, which areslightly outturned, are inclined toward each other, being adapted to engage a projecting spindle II on the lamp H and make contact with the inner lamp-terminal, connected at its to said spindle.

J is a U-shaped bracket secured at its base to the insulator-plate by clamps j, having their shank engaged with the bracket and their head with the depressed shoulder j of a soeketj in the top face of the base 0.

j is an arm projecting laterally and downwardly from the base of the U-shaped bracket J and adapted to receive a retainin screw j for the return-wire K, which passes through aperipheral groove 0 and slot c, similar to the ones for guiding the wire E, and thence outwardly through the nipple a.

L is a spring consisting of a substantially vertical arm l, the upper arm I, and the lower yielding spring'arm 1 having the depending lug Z provided with the inwardly-extending engaging foot P. The base of the arm Z is interposed between lugs J on one of the arms of the bracket J, and is thereby prevented from lateral movement. The vertically disposed arm Z lies on the outside of said arm of the bracket J, and the upperarm Z is mounted in a recess L in the lower face of the insulator-base B, being interposed between said base and the bracket J, and preferably secured in position by one of the screws for securing said bracket to said base-plate.

M is a cam having oppositelyarranged teeth adapted to encounter the base of the spring-arm l and force its engaging face Z into contact with the terminal I for opening and closing the electric circuit. The spindle N for rocking the cam is supported at its 0pposite extremities in the opposite arms of the bracket J, and is provided with the lug or pin a, mounted in a slot m in the inner face of the cam M, said pin being of less diameter than the width of the slot, in order that the spindle and cam may be connected together with a lost motion.

N is a shoulder projecting from the spindle and adapted to engage the inner wall of one of the arms of the bracket J for preventing outward movement of the spindle, and N is a similar pin adapted to engage a recess 0 in the inner end of the handpiece 0, mounted on said spindle. This hand-piece O is preferably formed from porcelain, as the same is a perfect non-conductor of electricity, presents a neat and finished appearance, and is not at all liable to become either burned or charred.

As previously stated in my application of even date herewith, it has been extremely di tiicult to practically secure a porcelain handpieee to a spindle, and in said application I have shown one means and in the present one another for so securin g the porcelain hand-piece.

0' is a socket in the outer face of the handle, and 0 a screw having its head mounted upon the depressed shoulder o of said socket and its shank engaged with a screw-threaded socket a in the spindle N. It will thus be noted that as the screw is turned down to its normal position its head is below the outer face of the hand-piece and cannot possibly be engaged by the hand in operating the switch, and that the pin N on the spindle, which engages the recess 0 in the hand-piece 0, prevents the said hand-piece from rotation on the spindle and causes the spindle to be revolved in either direction.

The operation of my invention willbe readily perceived from the foregoing description and upon reference to the drawings, and it will be noted that the outer shell A, bracket D, socket G, terminal I, bracket J, and spring L are all formed of sheet metal and the insulator-plates O and F and the hand-piece O of porcelain.

In my aforesaid applications, Serial Nos.

,100,498 and 400,500, I have shown the same construction of spring L herein described, butnot specifically claimed, and I havealso shown in said applicationsa somewhat similar construction of cam-rotating spindle and handpiece, and in the aforesaid application, Serial No. 400,498, I have illustrated and claimed the same construction of bracket D and second insulating-plate F; but it will be understood that I do not herein claim, except in combination, these parts specifically claimed in the aforesaid applications.

These parts may be cheaply produced and assembled, and when in operative position are strong, durable, and effective.

It is evident that the detail parts of my lamp-socket may be somewhat varied from those shown and described. Hence I do not limit myself to such precise detail construction.

I claim- Y 1. In combination, an insulator base-plate, a bracket consisting of a ring and oppositelyarranged arms secured to the base-plate, a second insulator-plate supported on the ring of the bracket, a lamp-engaging socket secured to the second insulator-plate, and movable lamp-engaging arms G on said socket, substan tially as and for the purpose described.

2. In combination, an insulator base-plate, a bracket consisting of a ring and oppositelyarranged arms secured to the base-plate, a second insulator-plate supported on the ring of the bracket and formed with a central opening, a terminal I, having depending arms 2' extending through the central opening of the second insulator-plate, a laterally-extending arm 1", secured to the top face of said second insulator-plate, and a lamp-engaging socket secured to the second insulator-plate, substantially as and for the purpose described.

3. In combination, an insulator base-plate, a bracket having one extremity secured to ,the base, a second insulator-plate secured to to the insulator base-plate, a laterally-extend,

ing arm Z on the spring, an arm 1 on the spring extending outwardly from the arm Z and a cam for engaging the arm Z and forcing the arm Z into contact with the terminal I, substantially as and for the purpose specified.

In testimony whereof I have hereunto signed my name, in the presence of two attesting witnesses, at Syracuse, in the county of Onondaga, in the State of New York, this 19th day of June, 1891.

JESSE L. HINDS.

Witnesses CLARK H. NORTON, L. M. BAXTER. 

